| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 74 |
| Registration plate issues | 57 |
| Rear reflector on motorcycle missing |1.4.1| | 29 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 26 |
| Registration plate lamp issues | 24 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 17 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 17 |
| Drive chain excessively loose |6.2.1d| | 17 |
| Windscreen wiper does not clear the windscreen effectively | 16 |
| Horn not working |1.7.3a| | 14 |
| Drive chain worn to excess |6.2.1e| | 14 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 14 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 11 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Drive chain excessively tight |6.2.1d| | 10 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 7 |
| Horn missing |1.7.1| | 6 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 6 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 6 |
| Rear Drive chain excessively loose |6.2.1d| | 6 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 6 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 6 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 6 |
| Offside Rear fog lamp not working |1.3.2b| | 5 |
| Nearside Front Direction indicators not working |1.5.1c| | 5 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 5 |
| Steering headbearing has excessive free play |2.2.2| | 5 |
| Throttle has a significant change in engine speed whilst moving the steering from lock to lock |2.1.4| | 5 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 5 |
| Rear Brake excessively binding (1.2.1 (f)) | 5 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 4 |
| Rear fog lamp tell tale not working |1.3.1b| | 4 |
| Rear fog lamp switch missing |1.3.1a| | 4 |
| Front position lamp|s| incorrect colour |1.1.A.3e| | 4 |
| Front position lamp|s| not working |1.1.A.3b| | 4 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 4 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 4 |
| Rear Wheel spoke excessively loose |4.2.1b| | 4 |
| Front suspension has inadequate damping effect. |2.3.6c| | 4 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 4 |
| Headlamp not working on main beam |4.1.1 |a| |ii|| | 4 |
| Brake pipe excessively corroded | 4 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 4 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 4 |
| Offside Rear Footrest missing |6.2.1a| | 4 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 4 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Headlamp insecure |1.2.3b| | 4 |
| Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Front wheel bearings have excessive free play |2.3.5b| | 4 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 3 |
| Offside Rear fog lamp emits a light other than red |1.3.2e| | 3 |
| Offside Rear fog lamp missing |1.3.2a| | 3 |
| Side repeater missing |1.4.A.2b| | 3 |
| Front Headlamp aim beam image kick up to the offside |1.8| | 3 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Riders seat insecure |6.2.1a| | 3 |
| Nearside Front Direction indicator not working |1.5.1c| | 3 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 3 |
| Brakes imbalanced across an axle | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 3 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 3 |
| Offside Rear Stop lamp not working |1.2.1b| | 3 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 3 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 3 |
| Nearside Rear Footrest missing |6.2.1a| | 3 |
| Front Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 3 |
| Parking brake: efficiency below requirements |3.7.C.1b| | 3 |
| Parking brake lever has no reserve travel |3.1.6b| | 3 |
| Parking brake efficiency below requirements |3.7.C.1b| | 3 |
| Nearside Rear wheel bearing has excessive play |2.6.2| | 3 |
| Front Brake lever cannot be applied smoothly |3.1.3d| | 3 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 3 |
| Windscreen wiper blade insecure | 3 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 3 |
| Locking device|s| not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 3 |
| Horn not working |1.6.2a| | 3 |
| Throttle operating incorrectly |6.2.1f| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Nearside Front Shock absorber has a serious fluid leak (5.3.2 (b)) | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Rear fog lamp not working (4.5.1 (a) (ii)) | 3 |
| Drive chain excessively loose (6.1.7 (c) (i)) | 3 |
| Horn not working (7.7 (a) (ii)) | 3 |
| Exhaust carbon monoxide content at idle exceeds default limits (8.2.1.2 (b)) | 3 |
| Front Brake excessively binding (1.2.1 (f)) | 3 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 2 |
| Offside Stop lamp not working |1.2.1b| | 2 |
| Nearside Front position lamp|s| incorrect colour |1.1.A.3e| | 2 |
| Offside Front position lamp|s| incorrect colour |1.1.A.3e| | 2 |
| Front Side repeater missing |1.4.A.2b| | 2 |
| Rear wheel rotation likely to be impeded |6.2.1b| | 2 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 2 |
| Hazard warning lamps not flashing in phase, with ignition on |1.4.B.1f| | 2 |
| Hazard warning lamps not flashing in phase, with ignition off |1.4.B.1f| | 2 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 2 |
| Front Steering headbearing has excessive free play |2.2.2| | 2 |
| Offside Rear Direction indicators not working |1.5.1c| | 2 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 2 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 2 |
| Rear Rear fog lamp missing |1.3.2a| | 2 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Rear brake binding | 2 |
| All position lamps not working |1.1.A.3b| | 2 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 2 |
| Front wheel bearings are excessively rough |2.3.5b| | 2 |
| Nearside Rear Anti-roll bar linkage has excessive play in a ball joint |2.4.G.2| | 2 |
| Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Rear Footrest missing |6.2.1a| | 2 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 2 |
| Rear Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 2 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 2 |
| All position lamps not working |4.2.1 |a|| | 2 |
| Rear Lower Suspension component pin or bush excessively worn |5.3.4 |a| |i|| | 2 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 2 |
| Engine MIL inoperative or indicates a malfunction |8.2.1.2 |h|| | 2 |
| Nearside Front Position lamp not working |4.2.1 |a| |ii|| | 2 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 2 |
| Motorcycle structure insecure and likely to affect the correct functioning of the steering or braking |6.1.1c| | 2 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 2 |
| Front suspension assembly component loose |2.3.1| | 2 |
| Front Direction indicator missing |1.5.1a| | 2 |
| Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 2 |
| Nearside Front Headlamp not in good working order adversely affecting beam image |1.2.4a| | 2 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 2 |
| Front Brake excessively binding |1.2.1 |f|| | 2 |
| Rear Stop lamp not working |1.2.1b| | 2 |
| Offside Rear Direction indicator not working |1.5.1c| | 2 |
| Rear Brake disc|s| has excessive run out |3.2.A1m| | 2 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 2 |
| Rear Locking devices not correctly fitted which may make the motor bicycle dangerous to ride |6.2.1h| | 2 |
| Nearside Front Position lamp not working |4.2.1 |a|| | 2 |
| Offside Front Anti-roll bar linkage ball joint excessively worn |5.3.4 |a| |i|| | 2 |
| Exhaust carbon monoxide content after 2nd fast idle exceeds default limits |8.2.1.2 |b|| | 2 |
| Offside Rear wheel bearing has excessive play |2.6.2| | 2 |
| Chain guard insecure |6.2.1c| | 2 |
| Offside Rear Direction indicator insecure |1.5.3b| | 2 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 2 |
| Brake hose damaged | 2 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 2 |
| Rear Brake disc fractured |1.1.14 |a| |ii|| | 2 |
| Brake performance not tested |3.3| | 2 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 2 |
| Offside Handlebar deformed |2.1.1b| | 2 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 2 |
| Exhaust emissions carbon monoxide content after 2nd fast idle excessive |7.3.D.3| | 2 |
| Rear Position lamp not working (4.2.1 (a)) | 2 |
| Front Valve stem seriously damaged (5.2.3 (j)) | 2 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 2 |
| Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 2 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 2 |
| Nearside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 2 |
| Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Front Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| Exhaust carbon monoxide content after 2nd fast idle exceeds default limits (8.2.1.2 (b)) | 2 |
| Throttle control functioning such that safe operation of the motorcycle is adversely affected (6.2.7 (a) (ii)) | 2 |
| Front Shock absorber has negligible damping effect (5.3.2 (b)) | 2 |
| Front Brake disc contaminated (1.1.14 (b)) | 2 |
| Drive chain worn to excess (6.1.7 (c) (i)) | 2 |
| Rear Drive chain sprocket worn to excess (6.1.7 (c) (i)) | 2 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 2 |
| All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Throttle operating incorrectly (6.2.7 (a) (i)) | 2 |
| Front Stop lamp not working (4.3.1 (a) (ii)) | 2 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 2 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 2 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 2 |
| Exhaust carbon monoxide content after 2nd fast idle exceeds manufacturers specified limits (8.2.1.2 (a)) | 2 |